智人可能的非洲-阿拉伯扩张路线沿线气候的时空变化

IF 2.9 Q2 GEOGRAPHY, PHYSICAL Quaternary Science Advances Pub Date : 2024-03-08 DOI:10.1016/j.qsa.2024.100174
Markus L. Fischer , Philipp M. Munz , Asfawossen Asrat , Verena Foerster , Stefanie Kaboth-Bahr , Norbert Marwan , Frank Schaebitz , Wolfgang Schwanghart , Martin H. Trauth
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引用次数: 0

摘要

在更新世晚期,东非和阿拉伯是主要的类人猿热点地区,也是向亚洲迁徙的关键十字路口。为了解读时空环境变化对人类占领和迁徙模式的影响,我们重新测量了亚丁湾流星遗址 KL 15 的海洋岩芯,并利用线性和非线性时间序列分析方法,将其数据与东非 ICDP 遗址 Chew Bahir 的干旱指数和地中海东部 ODP 遗址 967 的干湿指数一起进行了重新分析。这些分析表明,在 400 ka BP 和 150 ka BP(1950 年前的一千年),古气候的时空动态发生了重大变化,这可能是受轨道偏心率振幅变化的驱动。从 400 ka BP 到 150 ka BP,非洲东部和阿拉伯显示出同步的干湿变化,这种变化在 150 ka BP 时急剧改变。公元前 150 ka 年之后,可以观察到气候状态总体呈干燥趋势,非洲东部和阿拉伯之间的水文气候动态呈负相关。这些气候的时空变化和相互关系可能会影响人类沿这些顶点扩张的空间联系。我们观察到,在假定的智人非洲外迁阶段,网络链接呈正相关。此外,我们的数据并没有表明在气候潮湿或稳定的特定时间段内出现了人类占领阶段,而是提供了证据,证明气候的可预测性作为人类生态竞争力的一个重要因素所发挥的潜在作用迄今被低估了。
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Spatio-temporal variations of climate along possible African-Arabian routes of H. sapiens expansion

Eastern Africa and Arabia were major hominin hotspots and critical crossroads for migrating towards Asia during the late Pleistocene. To decipher the role of spatiotemporal environmental change on human occupation and migration patterns, we remeasured the marine core from Meteor Site KL 15 in the Gulf of Aden and reanalyzed its data together with the aridity index from ICDP Site Chew Bahir in eastern Africa and the wet-dry index from ODP Site 967 in the eastern Mediterranean Sea using linear and nonlinear time series analysis. These analyses show major changes in the spatiotemporal paleoclimate dynamics at 400 and 150 ka BP (thousand years before 1950), presumably driven by changes in the amplitude of the orbital eccentricity. From 400 to 150 ka BP, eastern Africa and Arabia show synchronized wet-dry shifts, which changed drastically at 150 ka BP. After 150 ka BP, an overall trend to dry climate states is observable, and the hydroclimate dynamics between eastern Africa and Arabia are negatively correlated. Those spatio-temporal variations and interrelationships of climate potentially influenced the availability of spatial links for human expansion along those vertices. We observe positively correlated network links during the supposed out-of-Africa migration phases of H. sapiens. Furthermore, our data do not suggest hominin occupation phases during specific time intervals of humid or stable climates but provide evidence of the so far underestimated potential role of climate predictability as an important factor of hominin ecological competitiveness.

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来源期刊
Quaternary Science Advances
Quaternary Science Advances Earth and Planetary Sciences-Earth-Surface Processes
CiteScore
4.00
自引率
13.30%
发文量
16
审稿时长
61 days
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